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He is seen speaking to both his old teammates from Nagoya Sei, Yagyuu, Atobe, and Ryoma in English. He is described as a ruthless person on the court that crucifies his opponents. Kirihara described him as "annoying" when Kite asked who Krauser was (in reference to Kirihara's match against Krauser during the National Semi Finals). He has yet to let anyone call him by his surname, perhaps due to his Western upbringing.

His overall Japanese is quite polite, most likely due to the fact that he is still learning the language.

After the nationals, he is invited to the U-17 Training Camp and defeats his partner Richard Sakata 7-1 in the tiebreaker eliminations match (7-0 in the manga), "crucifying" him. In the manga, Sakata had tripped Krauser prior to their match, but this was not shown in the anime.

Krauser, after being defeated by Nakagauchi.

Krauser enters the 5th court, and during the 3rd vs 5th court shuffle, he loses to Nakagauchi Sotomichi by forfeit despite "crucifying" the high schooler many times. Nakagauchi then carries the fallen Krasuer off the courts, and tells Oni that Krauser will become strong, to which Oni replies "I know." Also, Kirihara originally badmouths Krauser during the start of the match because of his grudge against Krauser's crucification (Nationals), but eventually comes to support Krauser after watching him play. Kirihara even says that he will get revenge on the 3rd court for Krauser as he and Shiraishi get ready for Doubles 2 match against them.

During Krauser's match with Nakagauchi, it is revealed through flashbacks there that while the rest of his foreign exchange teammates went back to their home countries, Krauser stayed behind because he was upset that they lost to the Japanese Middle Schoolers, whom they had believed to be weaklings in a country where tennis was underdeveloped. He questions why they lost to the Japanese middle schoolers, whom they had all looked down upon.

Though he lost, the 5th court ultimately wins and he and the other 5th court members end up swapping places with the 3rd court members.

According to the Chinese translations, he is an all-rounder, although he is an aggressive player and defeats his opponents by crucifying them. Liliadent is perhaps the strongest foreign exchange student from Nagoya Seitoku. It seems that he has never lost a match before losing to Akaya since his teammates were shocked that he allowed a ball to fly pass him. He is strong enough to defeat Akaya Kirihara before the latter entered Devil Mode. As shown in Chapter 31 of The New Prince of Tennis, Krauser's breakdown is 3 in Speed, 3 in Technique, 2 in Stamina, 2 in Mentality and 5 in Power.

The ball goes downwards but suddenly curves upwards towards the opponents face without hitting the ground. It is shown in New Prince of Tennis that Krauser also uses his Hopping Ball to not only hit his opponent, but to also create the cross which he embeds his opponent in.

Krauser defeats his opponents by making a grave marker on the grill behind the opponent and finally crucifying them. He mostly uses the technique on a cord ball and aims for opponent's chest. After he has completed the Grave Marker, Krauser uses a Hopping Ball which creates an illusion of many balls forming a cross and is impossible to dodge. As the ball connects with the opponent, Krauser says, "Bear the cross and suffer..."